Very defensive kingsnake is suddenly calm?? Is there something wrong with her??

Am I worrying for no reason?? For the 2 months I've had my baby ca king, I've made no progress taming her down. She strikes and rattles her tail, and will do everything she can possibly do to not get picked up until today. Today, she let me just scoop her up with no problem, and i handled her for five minutes with no signs of discomfort whatsoever. I was shocked at the sudden temperament change. Is this just a strange occurrence, or could there be other problems? Thanks!